/Engine/Plugins/Experimental/AnimNext/Source/AnimNext/Public/Param/ParamStack.h
Get the value of a parameter given aFName. Potentially performs a copy of the value.
the parameter's value, or a default value if the parameter is not present
template<typename ValueType> ValueType GetParamValue ( [FName](API\Runtime\Core\UObject\FName) InKey, [FParamStack::EGetParamResult](API\Plugins\AnimNext\Param\FParamStack\EGetParamResult) * OutResult ) const